Abstract: A method and apparatus for recovering heat and volatilized fluid contaminates or smoke from an airstream, and which includes continuously spraying a fluid, such as lightweight oil, into the airstream, collecting and cooling the sprayed fluid and any condensed contaminates, and recirculating the collected and cooled fluid and condensed contaminates to make-up the fluid which is sprayed into the airstream. Heat is recovered from the airstream as part of the step of cooling the fluid and condensed contaminates, and a substantial portion of any remaining contaminates may be removed in a downstream precipitator.